/Engine/Source/Runtime/CoreUObject/Public/Blueprint/BlueprintSupport.h
This should be the case for any object that's had its initialization deferred (need to initialize before you serialize), and any dependencies (sub-objects, etc.) waiting on that object's initialization.
True if Object's load/serialization should be skipped (for now).
virtual bool DeferPreload ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * Object )